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Diversity of Protists I

Diversity of Protists I

Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...

Diversity of Protists IV

Diversity of Protists IV

Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...

Diversity of Protists II

Diversity of Protists II

Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...

Diversity of Protists III

Diversity of Protists III

Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...

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Quantification of Acanthamoeba spp. Motility

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Published on: September 20, 2024

The tetrahymena and acanthamoeba model systems.

Sharon G Berk¹, Rafael A Garduño

¹Center for Management, Utilization and Protection of Water Resources, Tennessee Technological University, Cookeville, TN, USA. SBerk@tntech.edu

Methods in Molecular Biology (Clifton, N.J.)

|November 15, 2012

Summary

Protozoa are crucial in human pathogen evolution and amplification. This chapter details effective methods for studying protozoa, particularly Legionella, and their role in environmental health.

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Area of Science:

Protozoology
Environmental Microbiology
Pathogen Evolution

Background:

Protozoa are increasingly recognized for their role in human pathogen evolution and amplification.
Legionella, an accidental human pathogen, naturally infects freshwater protozoa.
Despite its significance, protozoology is underrepresented in academic curricula.

Purpose of the Study:

To provide effective experimental procedures for studying protozoa and their interactions with pathogens.
To offer guidance on methods to avoid, based on extensive research experience.
To highlight the importance of protozoa in understanding environmental pathogenicity.

Main Methods:

Detailed protocols for culturing and manipulating protozoan hosts (e.g., amoebae, ciliated protozoa).
Methodologies for studying Legionella within protozoan hosts.
Experimental approaches to investigate pathogen-protozoa interactions and ecological roles.

Main Results:

Established and refined protocols for successful protozoan research.
Identified critical methodological considerations and potential pitfalls.
Demonstrated the utility of specific techniques for advancing Legionella research.

Conclusions:

Effective methodologies are essential for advancing the study of protozoa and their role in human health.
Understanding protozoan biology is key to controlling environmental pathogens like Legionella.
Further integration of protozoology into academic settings is warranted.